Presentation #314.04 in the session “Brown Dwarfs 1”.
Subdwarfs, objects that have metallicities significantly lower than that of the Sun, provide insight into understanding how metallicity affects observable features of low-mass stars and brown dwarfs. Currently, substellar subdwarfs are thought to have cloudless atmospheres due to reduced condensate opacities from their low-metallicities. In this talk, I aim to explore the nature of clouds in subdwarfs using the spectral inversion modeling technique of atmospheric retrievals. With this technique, we derive a Pressure-Temperature (PT) profile to describe the atmospheric structure of a given target. Using the retrieval code Brewster, I compare a sample of field sources of similar temperature or spectral type to SDSS J1416A — an L dwarf primary in a widely-separated subdwarf binary system— to determine how the PT profile of these objects compares and what may drive the differences we see in their spectra. I will present the initial findings of this work which shows the need for longer wavelength data to fully constrain the cloud properties of substellar objects.